Rubber powered model airplane nose block

This is a nose block for rubber powered free flight models, to be used with carved or plastic props. Should be useful in many types of rubber powered models up to P-30. The base design is 1 inch square at the base, and assumes 1/8 inch fuselage tops and sides. The part that fits inside is therefore 3/4 inch square. It is best printed with a single layer to keep the weight down, and is easily scaled up and down using your slicer software (I used Cura 2.6).